Bumper problems of the 1999 Chevrolet Camaro

Right and left front fenders are not connected to the frame under the vehicle. The dealer was asked to reattach the right fender. They did attach it, however it now sticks out. Upon returning to the dealership we requested they reattach the fender so that it is no longer sticking out. We also requested that they check the left fender as we had noticed it to be loose as well. The manager at the dealership had checked the fenders and said that they are not covered under warrenty and it appears that the vehicle had been bottomed out. The vehicle had not been bottomed out and showed no signs of such on the bottom of the vehicle. How can they repair the right fender and they say that the same problem on the left side is not covered under warrenty? I would like to have some answers.